21231130101 has 4 divisors (see below), whose sum is σ = 28308173472. Its totient is φ = 14154086732.

The previous prime is 21231130061. The next prime is 21231130103. The reversal of 21231130101 is 10103113212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21231130101 - 2⁷ = 21231129973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231130103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3538521681 + ... + 3538521686.

It is an arithmetic number, because the mean of its divisors is an integer number (7077043368).

Almost surely, 2^21231130101 is an apocalyptic number.

It is an amenable number.

21231130101 is a deficient number, since it is larger than the sum of its proper divisors (7077043371).

21231130101 is an equidigital number, since it uses as much as digits as its factorization.

21231130101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7077043370.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21231130101 its reverse (10103113212), we get a palindrome (31334243313).

The spelling of 21231130101 in words is "twenty-one billion, two hundred thirty-one million, one hundred thirty thousand, one hundred one".